Question about Grundfos Pumps Grundfos Alpha 1555f Circulator Pump 117hp 1 Ph 115v 0. 5amp

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Grundfos 15-55F has two dashes on lcd, meaning it needs a pwoer cycle. This happens after less than a minute of a power cycle.

There are two pumps, the other one is fine. It just started happening today. Controlled by Taco boxes.

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Grungfos JPF4 not pumping believe impeller stuck


Normally I disconnect the power and try to spin the shaft, I do not know this pump well enough to tell you how to get to the shaft. I would listen closely to the motor then turn it on, if it hums it probably has a bad start capacitor. These tend to fail quickly when the pump cycles a lot.

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Grundfos pump


It sounds like you have a bad pressure switch. I would also check the pre-charge pressure in the expansion tank. This needs to be 2lbs less then the "cut-in" pressure of the switch IE: 30-50 switch 28lbs air in pressure tank.
RJH2O

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Grundfos runs intermittently and needs power cycle to get going again


What type of pressure switch or pump controller on pump? Could be capacitor check. with power on try spinning fan at rear if starts probably cap. Have it checked. Could be controller faulty.

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My water heater needed to be restarted and my comfort recirculation system isn't working now.I"m hoping it is just the timer. I need to reset the timer and I don't know how. I can't find my manual....


Grundfos timer and pump operate by plugging into ordinary 120V outlet.

1) If outlet has power, then dial on timer should rotate.
If dial is not rotating, then check power to outlet.

2) If outlet has power, but timer is not rotating then timer has gone bad > if grundfos pump is working but timer is not working, you can buy cheap plug-in timer and use that as the timer.

3) If outlet has power and pump is not working, then manually rotate timer dial to see if pump will start.
If pump will not start, then you need a new grundfos.
There are no repair parts for these pumps, and nobody at Fixya has reported taking Grundfos apart and repairing it.
My Grundfos pump will not come apart.

4) Following link has links to Grundfos installation manual, website, product manuals, and contact.
http://waterheatertimer.org/Water-heater-recirculation-system.html#Grundfos

5) To set timer: Grundfos timer dial has movable pins that are used to set on-off times.
When pins are pushed out, timer turns pump ON.

6) Rotate timer dial clockwise until current time lines up with arrowhead located on inner dial.
Dial rotates as time passes, and pins move a lever that turns pump on-off.

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, expert speaks with you over phone while you work on Grundfos or any do-it-yourself project.
Fixya is always less expensive than a service call.

Feb 09, 2011 | Grundfos Comfort System Recirculator ...

1 Answer

Need to find a link to the owner's manual/ repair manual for the Grundfos up10-16 b5/atlc......


Following link shows links to grundfos and grundfos manuals.
http://waterheatertimer.org/Water-heater-recirculation-system.html#Grundfos

1) My grundfos stopped working because sediment clogged the pump, and the motor slowed.
When motors slow, they get hot and burn up.
I ask my friend who rewinds motors how to fix it, he said in the old days, they rewound every motor, but today they throw valuable scrap into landfill, and then buy new motors from China.
I told him not to retire, but go to school and teach kids how to rewind motors, and then took apart the grundfos line and cleaned it out with CLR, but it never worked again.

2) If timer stops working, but pump still works, you can buy cheap plug-in timer and connect grundfos to the cheap timer

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, expert speaks with you over phone while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Jan 23, 2011 | Grundfos UP10-16B5/ATLC Comfort Series...

1 Answer

How to program timer?


Diagram showing timer tabs being pushed in or out to set programs:
http://waterheatertimer.org/Water-heater-recirculation-system.html#Grundfos

Grundfos illustrated installation guide
http://waterheatertimer.org/pdf/Grundfos-L-UP-TL-043-install-photos.pdf

Rotate programming ring clockwise until current time lines up with arrowhead on inner dial.
Current time must be reset after power outage.
Tabs located around programming ring control timer functions.
Each tab represents 15 minutes.
Tabs push in or out using a pen.
Tabs out = grundfos ON
Tabs in = grundfos OFF
Set manual switch to TIMER and timer program operates pump
Set manual switch to ON or OFF to override timer program

geno_3245_136.jpg

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1 Answer

Timer gets off by hours


I have circulation system on my water heater.
First system gave out.
When taken apart, it was clogged with sediment and couldn't be cleaned.
Put sediment filter on line, and second circulation system works fine, and timer works fine too.
I haven't had timer problem, but have investigated timer motors running fast and slow.
My friend who re-winds big pump motors says homeowner timer motors are engineered for 60Hz.
As long as electric power is 60Hz (60 cycle AC), then motor will keep exact time.
Since your household current is 60Hz and other electro-mechanical timers run correctly, then it's likely timer motor has a flaw or has gone bad.
Grundfos water heater re-circulation pump and timer are sealed unit.
Grundfos manuals do not show parts list or repair steps:
http://waterheatertimer.org/Water-heater-recirculation-system.html#Grundfos
It's aggravating when expensive household timers like Malibu power packs and Grundfos pumps are not made to be repaired.

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2 Answers

Grundfos UPS 25-50 180 - start up


Are you able to check for power to the pump with a mult-meter. If you have power you the know the pump has siezed (flat spot on the motor) if there is no power then you know there are issues with the controls.
I hope this may have helped,
Tom

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